#include<stdio.h>

typedef int (*Cal)(int, int);
int Sum(int a, int b)
{
	return a + b;
}
int main()
{
	int a = 9, b = 2, c = 0;
	c = Sum(a, b);
	printf("%d\n", c);

	Cal cal = &Sum;
	c = cal(a, b);
	printf("%d\n", c);
	return 0;
}
